Motor bolt hole question

[Kracker Jack]

I drilled my holes a 1/2 inch larger than my motors bolts. I then hotcoated the holes and taped one side closed. I then filled the hole with thickened resin and then glassed 2 patches of 1.5 csm on either side. The next day i drilled the holes to the actuall bolts size leaving 1/4 ring of glass around the bolt hole. Now this is the extreme end of the spectrum! And almost a little radical. Hot coat with West Systems 105 then use 3m 4200. I used 5200 on my first motor i mounted on my boat....when i took it off to put my suzuki on it pulled the paint and some gelcoat right off. I would west systems and 4200 if i did it again. If yo dont have west systems use a vinylester resin or a thinned polyester resin

[Blue_Runner]

I heart this thread. Not advocating 5200 ideas but deinstall damage pales in comparison to years worth of water intrusion. The worst that can be done is not sealing at all... Appreciate all the ideas as I am hoping to repower really soon.

[Destroyer]

Read my post again. What I said was I let the 5200 dry, THEN hang the engine. That way you get the sealing of the 5200, without the headaches it you need to repower. Unless you damage the threads on a bolt, the stainless bolts will last longer than the boat usually. This is a one and done solution.

[spareparts]

Ive seen the outer skin of a transom pulled off of a boat while trying to remove an engine that was installed with 5200, it destroyed a solid transom. 5200 stills cures and adheres for weeks after its installed. Life Caulk is rated for under water line use. You need a sealant, not an adhesive(5200)

[3 Squids]

Ok so I've kinda combined everyone's advice. Last night I used acid brushes and brushed a liberal amount of 5200 in the transom holes then applied a good coat on the bolt shanks and inserted the bolts through the transom. I also put a bead around the outside of the bolt holes and wiped it around the bolt real good. Sure enough today then babies are stuck in there good. Now I plan on doing a good bead of LifeCaulk around the bolts when I set the motor. I feel this should suffice.

[3 Squids]

Question about this 5200 stuff. Never used it before. I brushed it on last Thursday evening and inserted the bolts. Came out Sat. and hung the motor and the stuff was still wet. A little stick but still could wipe right off. It's now Tuesday and the stuff is still not dry. Is this normal? Seems to be more tacky then Sat. but still I can wipe it right off. Bought it from West Marine so I figure they have a pretty fresh stock.

[Destroyer]

Originally Posted by 3 Squids

Question about this 5200 stuff. Never used it before. I brushed it on last Thursday evening and inserted the bolts. Came out Sat. and hung the motor and the stuff was still wet. A little stick but still could wipe right off. It's now Tuesday and the stuff is still not dry. Is this normal? Seems to be more tacky then Sat. but still I can wipe it right off. Bought it from West Marine so I figure they have a pretty fresh stock.

Is it the regular 5200 or the 5200 fast cure? The fast cure usually takes about 2-3 days to harden. I've never used the regular so can't provide any info on it. As to Spareparts' comment about 5200 still hardening after weeks, that sounds like what you may be experiencing.

A quick comment about that by the way. If you use my method and you're still worried about an engine adhering to the boat... like anything else in this word, use the KISS principal. Instead of trying all kinds of different materials, methods, etc... just go into your kitchen pantry, get out the roll of plastic wrap that you use for sealing bowls of leftover food, take it to the boat, cut a roughly 3" x 3" square, punch a hole in the middle slightly smaller than the bolt diameter and slide it down over the bolt and up against the hull and any sealant that happens to be there. The (obvious) goal is to provide a thin membrane between the engine and the sealant when you hang the engine. That way when you remove the engine there's no chance of it being stuck to the sealant since it never touched the sealant in the first place. K.I.S.S. Keep It Simple Stupid